Adjustment for tilting-chairs.



H. w. BoLENs.

ADJUSTMENT FoR'lLTING CHAIRS. AAPPLICATION FILED IUNE16| |9l5 RENEWEDMN. 22' 19H..

1,217,268. Patented Feb. 27,1917.

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HARRY W. BOLENS, 0F PORT WASHINGTON, WISCONSIN, ASSIGNOR TO GILSON MANU-FACTURING- COMPANY, OF PORT WASHINGTON, WISCONSIN, A CORPORATION 0FWISCONSIN.

Specification of Letters Patent.

Patented ret. 27, 1917.

Application filed June 16, 1915, Serial No. 34,412. Renewed January 22,1917. Serial No. 143,844.

To all whom t may concern:

Be it known that I, HARRY W. BoLENs, a citizen of the United States,residing at lort Washington, in the county of Ozaukee and State ofWisconsim have invented a new and useful Adjustment for Tilting- Chairs,of which the following is a specification.

My invention relates to improvements in tilting-chairs, and hasparticular reference to a new and improved adjustment for the same-thatis, for raising and lowering the chair-supporting mechanism.

The principal objects of the invention are to avoid wear, and thusincrease the life of the adjustment, by substituting for the well-yknown threaded adjusting-post, designed to raise and lower in a threadedsocket located in the chair-base, a fixed post, and mount upon the samefor vertical adjustment the chair carrying-means or mechanism; and,furthermore, to reduce the cost of the adjustment by a simplificationand reduction in the number of the parts composing the same, and yet atthe same time sacrice none of the convenient features thereof wherebythe chair-seat may be readily raised and lowered.

Other, though minor objects, of the invention will hereinafter appear,and the novel features of the invention will be particularly pointed outin the appended claims.

Referring to the drawing- Figure 1 is a vertical, central, sectionalview of a portion of a chair-base carrying an adjustment constructed inaccordance with my invention, parts being shown in elevation; and, v

Fig. 2 is a horizontal cross-sectional view on the line 2-2 of Fig. l;while, Y

Fig. 3 is a detail in inverted plan of the washer.

Similar numerals of reference indicate similar parts in all the gures ofthe drawhe chair-base l, s of the conventional form, and has let intoits upper side and at its center, the metal bushing 2, at the upper endof which Occurs the circular flange 3.

Within the bushing, in the present in stance, is secured by a set-screw4, the nonrotatable rigid adjusting-post 5, which eX- tends above thebushing a suit-able distance and is threaded. The inner end of thesetscrew 4L may simply impinge against the ading to mount the same inthe base in suchf manner as'to prevent all movement therein and thus doaway wlth the usual wear and consequent looseness.

Threaded upon the adjusting-post, is the hub 6, of an adjustinghand-wheel 7 the hub, of course, being thickened, as shown, so as toafford a suiiiciently long bearing on the adjusting-post to reduce wearto a minimum and lend rigidity. Formed integrally upon the upper side ofthis hub, and surrounding the threaded central opening therein, is avertical annularI flange 8, the upper edge of which is preferably flaredoutward whereby to form a peripheral lateral flange or bead 9.- Byforming the iiange 8, there is produced an annular socket 10, in theupper side of the hand-wheel 7 and immediately surrounding the upperthreaded portion of the adjusting-post 5.

Within this socket 10, there is neatly yet movably fitted a washer 15,(see detail Fig. 3) and the inner edge of the opening thereof is formedwith a lug 18. The washer-opening is unthreaded and is of a diameter toreceive the adjusting-post 5, which latter is formed with a longitudinalgroove 5", to receive the lug 1S, whereby, as will be obvious, thewasher is locked against rotation but yet is free to slide verticallyupon the post. The underside of the washer may be provided with aplurality of radiating preferably rounded ribs 17, the same beingdesigned to temporarily engage with corresponding shallow grooves 16,formed in the bottom of the socket 10, whereby, under ordinaryconditions, the hand-wheel and the washer are locked.

Above the washer may be located any desired form or construction ofstretcher sup porting yoke 11, the one herein shown, being of theconventional pattern, since, such is immaterial to my invention. In thisinstance, however, the yoke is provided with a central unthreadedopening of a diameter sufficient to snugly receive the adjustingpost, asindicated at4 12, and from one side of the yoke there depends a lug l1,which terminates below the peripheral liange or 110 bead 9 of thehand-wheel, and is provided with a threaded perforation coincident witlA,Y the underside of said flange or bead, to re washer 15, the lower endof the yoke, there fore, not exceeding` the diameter of th washer. lfdesired, as will be perfectly ob-i vious, any ordinary anti-frictiondevices may be interposed between the lower end of the voke and theupper side of the washer, but such are not believed to be necessary and,hence, are not shown. lf preferred, the yoke may rest on the flange 9.

The operation of the invention will be readily apparent, it being seenthat any vertical adjustment may be obtained by simply rotating thehand-wheel 7 so that the same will be fed up or down upon the threadedadjusting-post 5. During such operation, the ribs 17 and recesses 16 ofthe washer and hand-wheel, respectively, will readily disconnect, suchbeing necessary in the present instance wherein these parts are shown astemporarily locked together, the washer being fed up or down, inaccordance with the direction of rotation of the hand-wheel, and withit, so also, is the yoke and the stretcher' and other parts carried bythe same, including the chair-seat.

The parts composing the adjustment, it will be seen, are comparativelyfew, and may be Vmade sufficiently heavy and strong to endure continuedand long service. j The device is readily manipulated and the handwheelthereof is immediately locked by the immovabley or non-rotatable washerin any position it occupies upon release. Finally, the undesirablelooseness occurring after use between the adjusting-post and chair-baseis eliminated, the leverage, caused by the weight of the personoccupying the chair, being transferred from the lower' to the upper endof the screw, and being shortened, is thereby reduced to a very greatdegree.

Having described my invention, what claim, is:

1. In a tilting-chair, the combination of a base, a iiXed adjusting-postrising therefrom and rigid therewith and provided above the base withthreads and a longitudinal groove, a hand-wheel threaded on the post,washer encircling -the post above the wheel and having a lug engagingthe groove in the post, and a stretcher-yoke having an opening receivingthe post and rotatable and adjustable thereon, and seated on the washer.

2. In. a, tilting-chair, the combination of a base, a fixedadjusting-post rising therefrom and rigid therewith and provided abovethe base with threads and a longitudinal groove, a hand-wheel threadedon the post, a washer encircling the post above the wheel, means fortemporarily locking the two together in a detachable manner, said washerhaving an internal lug engaging slidably with the groove in the post,and a stretcher-yoke having an opening receiving the post and rotatableand adjustable thereon, and seated on the washer.

3. ln a tilting-chair, the combination'of a base, a fixed adjlisting-post rising therefrom and rigid therewith and provided above thebase with threads and a longitudinal groove,

la hand-wheel threaded on the post, a washer encircling the post abovethe wheel, means for temporarily locking the two together in adetachable manner, said washer having an internal lug engaging slidablywith the groove in the post, a stretcher-yoke having an openingreceiving the post and rotatable and adjustable thereon, and seated onthe washer, and means for locking thel stretcheryoke and the hand-wheeltogether whereby to permit of independent rotation yet preventlongitudinal separation.

1. In a tilting-chair, the combination of a base, an adjusting-postrising therefrom and provided with threads and a longitudinal groove, ahand-wheel threaded on the post, a washer encircling the post and havinga lug engaging the groove of the post, means for temporarily anddetachably locking the washer and hand-wheel together, and a stretcherswiveled on the post and vertically adjustable by the hand-wheel.

5. Ina tilting-chair, the combination of a base, an adjusting-postrising therefrom and provided with threads and a longitudinal groove, ahand-wheel threaded on the post, a washer encircling the post and havinga lug engaging the groove of the post, removably interlocking lugs andgrooves formed on the meeting faces of the hand-wlieel and washer, and astretcher swiveled on the post and vertically adjustable by thehand-wheel.

6. ln a tilting-chair, the combination of a base, an adjusting-postrising therefrom and provided with threads and a longitudinal groove, ahand-wheel threaded on the post and provided on its upper side withradial shallow grooves, a washer encircling the post above thehand-wheel and engaging the groove of the post and provided on itsunderside with ribs removably engaging the grooves of the hand-wheel,and a stretcher swiveled on theV post and vertically adjustable by thehand-wheel. n

7. In a tilting-chair, the Vcombination of a base, an adjusting-postrising therefrom and provided with threads and a longitudinal groove, ahand-wheel threaded on the post, a washer encircling the post and havinga CIK lug engaging the groove of the post, said washer being locatedabove the hand-wheel, means for removably locking the washer andhand-wheel together, and a stretcher swiveled on the post and supportedby the washer.

8. In a tilting-chair, the combination of a base, an adjusting-postrising therefrom and provided with threads and a longitudinal groove, ahand-wheel threaded on the post, a washer encircling the post, andengaging the groove of the post, means for removably locking the washerand hand-wheel together, a stretcher swiveled on the post and adjustableby the hand-wheel, and means for removably engaging the hand-wheel withthe stretcher whereby they are locked against vertical separation andyet capable of independent rotation.

9. In a tilting-chair the combination of a base, a fixed adjusting-postrising therefrom and provided above the base with threads and alongitudinal groove, a hand-Wheel threaded on the post and having on itsupper side an annular Iiange forming an annular recess about the post,the bottom of the recess having radiating shallow grooves and the upperedge of the flange'having a peripheral surrounding bead, a circularWasher itting loosely Within the recess and provided with an internallug engaging the longitudinal groove of the post and upon its undersidewith shallow ribs corresponding to and removably engaging the grooves ofthe hand-wheel, a stretcher-carrying yoke loosely mounted on the postabove the handwheel and washer and free to rotate and verticallyadjustable on the post through the rotations ,of the hand-wheel, a lugdepending from the yoke below the peripheral rib of the liange of thewasher and provided with a threaded perforation, and a screw threaded inthe perforation and at its inner end engaging under the said peripheralrib.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HARRY W. BOLENS.

Witnesses:

OLAF ETTON, A. R. BOERNER Copies of this patent may be obtained for vecents each, by addressing the Commissioner of' Patents, Washington, D.C.

